Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2GR-FKS) - Diagnostic Codes (6 Of 6) & Circuit Tests (1 Of 2) >> SFI System >> DTC P2A00-26: O2 Sensor Circuit Range/Performance Bank 1 Sensor 1 Signal Rate of Change Below Threshold; DTC P2A03-26: O2 Sensor Circuit Range/Performance Bank 2 Sensor 1 Signal Rate of Change Below Threshold [12/2019 - 10/2022] >> Monitor Strategy